mufananidzo we Circuit Breakers
A Circuit Breaker chinhu chakakosha musimba remagetsi rinoshandiswa kuchengetedza nekudzora maseketi. Inogona kuvhara, kutakura uye kuputsa ikozvino pasi pezvakajairwa kana kukanganisa. Basa rayo guru rinosanganisira kuchengetedzwa kwepamusoro, kuchengetedzwa kwepfupi-circuit, undervoltage protection, etc. Iyo yakaenzana nekusanganiswa kwemafuse uye pamusoro / pasi-pasi-voltage thermal relays, asi ine yakakwirira kuvimbika uye kushandiswazve.

Main maitiro parameters
Rated voltage (Ue) : Mhepo yepamusoro-soro iyo inoputika sedunhu inoshanda nguva dzose, yakadai se220V, 380V, nezvimwewo 37

Rated current (In) : Iyo yakanyanya kukosha ikozvino inogona kutakurwa zvakachengeteka kwenguva yakareba, iyo inofanira kuva yakakura kudarika kushanda ikozvino kwedunhu ne35%.

Breaking capacity (Icu/Ics) : Iyo yekupedzisira pfupi-circuit breaking capacity (Icu) inoreva kugona kutyora yakanyanya kupfupi-circuit ikozvino panguva imwe. Operating breaking capacity (Ics) inoreva kuchikumbaridzo chazvino icho chinogona kushandiswa mushure mekutyoka. Kazhinji, mafirimu edunhu anopwanya anoda Ics≥50% Icu, uye akaumbwa ekesi anotyora anoda Ics≥25% ICU.

Nguva pfupi yekumira ikozvino (Icw) : Kugona kweanopaza dunhu kutsungirira pfupi-yedunhu ikozvino mukati menguva yakatarwa pasina kukuvara.

Ii. Kurongeka kweVapfuri Vedunhu
1. Nezinga remagetsi
High-voltage circuit breakers: Inoshandiswa muzvirongwa zve 3kV uye pamusoro. Kazhinji arc-kudzimisa media inosanganisira sulfur hexafluoride (SF6), vacuum, mafuta, nezvimwe.

Low-voltage circuit breaker akaiswa mumhando nhatu: furemu mhando (ACB), molded case type (MCCB), uye miniature mhando (MCB). 57.

2. Nekugadzirisa uye kushandiswa
Chimiro cherudzi rwedunhu chinotyora (ACB
Yakarongerwa ikozvino: 200A kusvika ku6300A, yakashongedzerwa nechina-nhanho dziviriro (kunonoka kunonoka, kunonoka kupfupi, pakarepo, uye kukanganisa kwepasi), inonyanya kushandiswa kuchengetedza kushandura kukuru muhurongwa hwekugovera kana midziyo yakakura.

Molded kesi circuit breaker (MCCB
Compact chimiro, yakayerwa ikozvino 10A kusvika 1600A, yakakodzera kuchengetedzwa kwebazi redunhu. Iyo yemagetsi MCCB inotsigira yakasarudzika kuchengetedza, uye mamwe mamodheru ane redunhu interlock basa 57.

Miniature Circuit Breaker (MCB
Inoshandiswa mumasekete ekupedzisira pazasi 125A (senge imba uye yekutengeserana), inowanikwa mu1P kusvika ku4P yakatarwa, uye inotsigira kuwandisa, kupfupi dunhu uye kuchengetedzwa kwekudonha.

3. Dhinda tekinoroji yekudzima arc
Vacuum circuit breaker: Kurumidza kudzima arc, hupenyu hurefu hwesevhisi, yakakodzera nguva zhinji mashandiro e4.

SF6 circuit breaker: Iyo ine yakanakisa insulation uye arc-kudzimisa kuita uye inonyanya kushandiswa mune yakakwira-voltage masisitimu. Kuchena kwegesi kunoda kuongororwa nguva dzose.

Iii. Misimboti yeSarudzo Yekuputsika Kwedunhu
Match circuit parameters
Rated voltage ≥ line voltage, rated current ≥ maximum load current, breaking capacity ≥ inotarisirwa pfupi-circuit ikozvino 57.

Rodha mhando adaptation
Dziviriro yemotokari inofanirwa kufunga nezvekutanga ikozvino (iyo yekukurumidza rwendo yekumisikidza kukosha ndeye 1.35 kusvika 1.7 nguva yekutanga ikozvino). Dunhu rekuvhenekesa rinotora katanhatu kurema kwazvino kwe78.

Sarudzo kurongana
Iwo ekumusoro uye epasi edunhu mabheji anofanirwa kusangana nemusiyano wenguva (senge kupfupi-kunonoka kuita musiyano ≥0.1s) uye mutsauko wazvino (chiito chazvino chepamusoro ≥ 1.2 nguva iyo yedanho rezasi) kudzivirira kupfuura-level kutsika.

Kuchinjika kwezvakatipoteredza
Kune yakakwirira-yakakwirira, yakanyorova kana yepamusoro-tembiricha nharaunda, yakakosha mhando dzinofanirwa kusarudzwa uye yakayerwa ikozvino yakagadziridzwa (kuderedza kugona kunodiwa kana tembiricha inopfuura 40 ℃). 13.

Iv. Circuit Breaker Testing uye Maintenance
Key test zvinhu
Static / Dynamic kuonana kuramba: Tsvaga yekuona kurasikirwa 12.

Mechanical maitiro ekuongorora: Kuvhura nekuvhara nguva, kumhanya uye panguva imwe chete 14.

Insulation performance: Kushingirira bvunzo yevoltage, vacuum degree yekuona (yevacuum circuit breakers) 14.

Kudzivirirwa basa verification: Calibration yekuremerwa uye pfupi-yedunhu kufambisa chiito maitiro 8.

Pfungwa huru dzekuchengetedza
Kugara uchiongorora: Gasi kudzvanywa (SF6 wedunhu breaker), kubata ablation, michina lubrication 48.

Miedzo yekudzivirira: Inoitwa zvinoenderana nezviyero zvakaita seGB/T 1984 uye GB 14048, kamwe chete pamakore 1 kusvika matatu.

Kukanganisa kubata: Kana iri kushomeka kweoiri, kupisa kana kuputika, kuparadzaniswa nekukurumidzira kunodiwa uye matambudziko nekusangana kana arc yekudzima system inofanirwa kuongororwa. 4.

V. Kuongororwa kweMatambudziko Anowanikwa
Musiyano uripo pakati pedunhu redunhu uye disconnector
Iyo disconnector (QS) inongoshandiswa kupatsanura magetsi uye haina arc-kudzimisa kugona. Iyo yedunhu breaker (QF) inogona kugura kukanganisa ikozvino kwegumi nemaviri.

Kukosha kweIcu neIcs
Icu inoratidza yekupedzisira kutyora kugona, uye Ics inoratidza kuvimbika kwekuenderera mberi kwekushanda. Mitsetse mikuru inotarisa kuIcs, nepo mitsara yebazi inotarisa paIcu8.

Kusarudzwa kwezvino-kumisikidza circuit breakers
Matanidza kushushikana kwekupisa kwetambo kuburikidza neazvino-yekumisa curve, uye ipa pamberi kune mamodheru nekukurumidza kutyora kumhanya (senge vacuum circuit breaker) 78.

Iyo leakage protection yatadza kushanda
Kunyanya nekuda kwekudzikira kwekuisa mutsetse kana kusasimba pasi, zvinodikanwa kuti uone kudonha kwazvino uye kugadzirisa chikumbaridzo chekuita (kazhinji 30mA kusvika 300mA)